1

Protection!:
You know the joke "Doc, it hurts when I do this." and Doc says "Don't do that! Well, for now try not to do those things. Also use a good knee brace to protect/imobolize the knee until you can see a doctor for an exam. Rest will help whatever it is to stop further irritation damage. Knees can be unforgiving, so treat them w/ gentle care. Best!
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Knee pain is a clinical finding in which the joint (where the bones meet) of the knee is painful to move. This can occur with Injury, arthritis, crystal build up in joints, immune conditions, and infections.
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3

Prob chondromalacia :
Probably chondromalcia patellae or simply the patella impacting the femur. Usually related to quadriceps muscle weakness. Pain on inside of knee could also be a bursitis, related to the accompanying knee instability.
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4

Patellofemoral Pain:
Pain in the front of the knee around the kneecap, that often gets worse with using stairs, prolonged sitting, or activity such as walking long distances is called patellofemoral pain syndrome. It can often be addressed with physical therapy. I would recommend seeing a physician to make sure nothing else is going on, and help guide your treatment plan.
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5

Knee Cap:
Knee pain is very common. The symptoms you describe on the surface sound like patellofemoral syndrome. This can have many causes. Some if which include improper muscle activation, misalignment of the knee cap, or poor biomechanics. The sharp pain in the thigh is not part of this process. I would recommend evaluation by a sports medicine specialist.
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NEED FOR CUSHION!:
Most shoes aren't always what is bad, usually it's the crummy insoles they come with! there are many possible reasons that you may have painful feet, but try cushioning arch supports like spenco polysorb cross-trainers(http://www.Spenco.Com/products/footcare/poly-sorb). If these don't help, see a podiatrist.... Also try an otc anti-inflammatory, like aleve.
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7

Joint or bursitis:
Your physician will need to evaluate you to see if you have internal knee problems in the inside medial knee such as cartilage or joint pain or if it comes from bursitis on the outside of your medial knee - often anserine bursitis. Each of these conditions could mimic the pain you describe.
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10

Patello-femoral:
You are describing some of the symptoms commonly associated with patella-femoral pain. The most common cause is chondromalacia patella (softening of the cartilage under the knee cap / precursor to arthritis. Other cases include supra pr infrapatella tendonitis or partial tears. See an orthopedist and get evaluated.
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